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| 19-0426; Rev 0; 8/95 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver _______________General Description The MAX1489E quad, low-power line receiver is designed for EIA/TIA-232, EIA/TIA-562, and CCITT V.28 communications in harsh environments. Each receiver input is protected against 15kV electrostatic discharge (ESD) shocks. These inputs have a 25V range and feature hysteresis and time-domain filtering. The outputs are TTL and CMOS compatible. The MAX1489E has a 120kbps guaranteed data rate. Supply current is typically 350A. The MAX1489E is pin compatible with the MC1489, MC14C89, SN75189, SN75C189, DS1489, and DS14C89. It is available in 14-pin plastic DIP and SO packages. ____________________________Features o Enhanced ESD Protection: 15kV--Human Body Model 8kV--IEC1000-4-2, Contact Discharge 15kV--IEC1000-4-2, Air-Gap Discharge o Latchup Free During an ESD Event o Low 350A Supply Current o Input Hysteresis and Time-Domain Filtering Eliminate the Need for External Filtering o Stable Input Thresholds o Pin Compatible with MC1489, MC14C89, SN75189, SN75C189, DS1489, and DS14C89 MAX1489E ________________________Applications PC Motherboards Modems Interfacing Data Terminal Equipment (DTE) with Data Circuit-Terminating Equipment (DCE) Equipment Meeting IEC1000-4-2 (formerly IEC801-2) or 15kV ESD Protection ______________Ordering Information PART MAX1489ECPD MAX1489ECSD MAX1489EC/D MAX1489EEPD MAX1489EESD TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C PIN-PACKAGE 14 Plastic DIP 14 SO Dice* 14 Plastic DIP 14 SO * Dice are specified at TA = +25C. __________Typical Operating Circuit __________________Pin Configuration 14 MAX1488E 14 MAX1489E TOP VIEW INPUT A 1 TTL/CMOS LOGIC INTERCONNECTING CABLE TTL/CMOS LOGIC N.C. 2 OUTPUT A 3 INPUT B 4 N.C. 5 MAX1489E 14 VCC 13 INPUT D 12 N.C. 11 OUTPUT D 10 INPUT C 9 8 N.C. OUTPUT C 14 MAX1489E SIGNAL GROUND PC MOTHERBOARD (DTE) 14 MAX1488E OUTPUT B 6 GND 7 MODEM (DCE) DIP/SO ________________________________________________________________ Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature. 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver MAX1489E ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC).............................................................+7V Input Voltage (VIN) ...............................................................30V Output Short-Circuit Current (Shorted to GND or VCC) (Note 1) ............................Self Limiting Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 10.00mW/C above +70C) ..........800mW SO (derate 8.7mW/C above +70C) ...........................695mW Operating Temperature Ranges MAX1489EC_D ...................................................0C to +70C MAX1489EE_D ................................................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = 5V 10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, TA = +25C.) PARAMETER DC CHARACTERISTICS Output Voltage High Output Voltage Low Output Short-Circuit Current (Note 1) Supply Current Input Voltage Range Input Voltage High Input Voltage Low Input Hysteresis Input Resistance TIMING CHARACTERISTICS Output Propagation Delay, Low to High Output Propagation Delay, High to Low Output Propagation Delay Skew, ItPLH - tPHLI Output Transition Time Input Noise Rejection Guaranteed Data Rate ESD CHARACTERISTICS Human Body Model ESD Protection IEC1000-4-2 (Contact Discharge) IEC1000-4-2 (Air-Gap Discharge) Note 1: Only one output may be shorted at a time. Note 2: See Noise Pulse Rejection graph in Typical Operating Characteristics section. 15 8 15 kV tPLH tPHL tSKEW tTR tN DR Figure 1 Figure 1 Figure 1 VOUT = 10% to 90% Pulse amplitude = 5V (Note 2) 120 1.38 1.45 70 35 1.0 240 120 4.0 4.0 s s ns ns s kbps VOH VOL IOS ICC VIN VIH VIL VHYST RIN 3.0 -25 1.60 0.75 2.17 1.06 1.11 5.0 7.0 VIN 0.4V IOUT = -3.2mA IOUT = -20A 3.5 2.5 -35 60 260 600 25 2.60 1.30 4.99 4.41 0.17 0.4 V V mA A V V V V k SYMBOL CONDITIONS MIN TYP MAX UNITS VIN 2.4V, IOUT = 3.2mA Shorted to GND Shorted to VCC 2 _______________________________________________________________________________________ 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver __________________________________________Typical Operating Characteristics (VCC = 5V, TA = +25C, unless otherwise noted.) MAX1489E PROPAGATION DELAY vs. TEMPERATURE MAX1489E-01 PROPAGATION DELAY SKEW vs. TEMPERATURE MAX1489E-02 NOISE PULSE REJECTION VIN = (VIL + VIH) PULSE AMP, 2 2 f = 300kHz MAX1489E-03 2.2 800 PROPAGATION DELAY SKEW (ns) 8 INPUT PULSE AMPLITUDE (Vp-p) PROPAGATION DELAY (s) 1.8 600 6 1.4 tPHL tPLH 400 VCC = 5.25V 200 VCC = 5V VCC = 4.75V 4 1.0 2 0.6 -40 -15 10 35 60 85 TEMPERATURE (C) 0 -40 -15 10 35 60 85 TEMPERATURE (C) 0 0.7 1.1 1.5 1.9 2.3 2.7 INPUT PULSE WIDTH (s) _____________________Pin Description 3.0V PIN 1, 4, 10, 13 2, 5, 9, 12 3, 6, 8, 11 7 14 NAME INPUT_ N.C. OUTPUT_ GND VCC FUNCTION Receiver Inputs No Connect--not internally connected Receiver Outputs Ground S.G. 0V 1.5V tPHL 90% tPLH VOH VOUT 50% 50% 10% Supply Voltage VOL tTR VCC tTR SIGNAL GENERATOR (S.G.) 50pF VOUT NOTE: S.G. SET TO f = 20kHz; DUTY CYCLE = 50%; tR, tF < 5.0ns Figure 1. Timing Diagram _______________________________________________________________________________________ 3 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver MAX1489E R C 1M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE R D 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST IP 100% 90% AMPERES Cs 100pF STORAGE CAPACITOR 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Model Current Waveform _______________Detailed Description 15kV ESD Protection As with all Maxim devices, ESD protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The MAX1489E receiver inputs have extra protection against static electricity found in normal operation. Maxim's engineers developed state-of-theart structures to protect these pins against ESD of 15kV without damage. After an ESD event, the MAX1489E keeps working without latchup. ESD protection can be tested in various ways; the receiver inputs are characterized for protection to the following: 1) 15kV using the Human Body Model 2) 8kV using the Contact Discharge method specified in IEC1000-4-2 (formerly IEC801-2) 3) 15kV using the Air-Gap Discharge method specified in IEC1000-4-2 (formerly IEC801-2). Human Body Model Figure 2a shows the Human Body Model, and Figure 2b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor. IEC1000-4-2 The IEC100-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX1489E helps you design equipment that meets Level 4 (the highest level) of IEC1000-4-2, without additional ESD protection components. The major difference between tests done using the Human Body Model and IEC1000-4-2 is higher peak current in IEC1000-4-2. Because series resistance is lower in the IEC1000-4-2 ESD test model (Figure 3a), the ESD withstand voltage measured to this standard is generally lower than that measured using the Human Body Model. Figure 3b shows the current waveform for the 8kV IEC1000-4-2 Level 4 ESD Contact Discharge test. The Air-Gap test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. ESD Test Conditions Contact Maxim for a reliability report that documents test setup, methodology, and results. 4 _______________________________________________________________________________________ 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver MAX1489E R C 50M to 100M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE R D 330 DISCHARGE RESISTANCE DEVICE UNDER TEST 10% t r = 0.7ns to 1ns 30ns 60ns t I 100% 90% I PEAK Cs 150pF STORAGE CAPACITOR Figure 3a. IEC1000-4-2 ESD Test Model Figure 3b. IEC1000-4-2 ESD Generator Current Waveform Machine Model The Machine Model for ESD testing uses a 200pF storage capacitor and zero-discharge resistance. Its objective is to mimic the stress caused by contact that occurs with handling and assembly during manufacturing. Of course, all pins (not just RS-232 inputs and outputs) require this protection during manufacturing. Therefore, the Machine Model is less relevant to the I/O ports than the Human Body Model and IEC1000-4-2. __________ Applications Information Use proper layout to ensure other devices on your board are not damaged in an ESD strike. Currents as high as 60A can instantaneously pass through the ground pin, so it is important to minimize the groundlead return path to the power supply. A separate return path to the power supply is recommended. Trace widths should be greater than 40 mils. VCC must be bypassed with 0.1F capacitors as close to the part as possible to ensure maximum ESD protection. _______________________________________________________________________________________ 5 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver MAX1489E ___________________Chip Topography V CC INPUT A INPUT D OUTPUT A OUTPUT D INPUT B INPUT C 0.096" (2.438mm) OUTPUT B OUTPUT C GND 0.071" (1.803mm) TRANSISTOR COUNT: 144 SUBSTRATE CONNECTED TO GND 6 _______________________________________________________________________________________ 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver ________________________________________________________Package Information E D A3 A A2 E1 DIM A A1 A2 A3 B B1 C D1 E E1 e eA eB L INCHES MAX MIN 0.200 - - 0.015 0.175 0.125 0.080 0.055 0.022 0.016 0.065 0.045 0.012 0.008 0.080 0.005 0.325 0.300 0.310 0.240 - 0.100 - 0.300 0.400 - 0.150 0.115 INCHES MIN MAX 0.348 0.390 0.735 0.765 0.745 0.765 0.885 0.915 1.015 1.045 1.14 1.265 MILLIMETERS MIN MAX - 5.08 0.38 - 3.18 4.45 1.40 2.03 0.41 0.56 1.14 1.65 0.20 0.30 0.13 2.03 7.62 8.26 6.10 7.87 2.54 - 7.62 - - 10.16 2.92 3.81 MILLIMETERS MIN MAX 8.84 9.91 18.67 19.43 18.92 19.43 22.48 23.24 25.78 26.54 28.96 32.13 21-0043A MAX1489E L A1 e B D1 0 - 15 C B1 eA eB Plastic DIP PLASTIC DUAL-IN-LINE PACKAGE (0.300 in.) PKG. DIM PINS P P P P P N D D D D D D 8 14 16 18 20 24 _______________________________________________________________________________________ 7 15kV ESD-Protected, Quad, Low-Power RS-232 Line Receiver MAX1489E ___________________________________________Package Information (continued) DIM INCHES MAX MIN 0.069 0.053 0.010 0.004 0.019 0.014 0.010 0.007 0.157 0.150 0.050 0.244 0.228 0.050 0.016 MILLIMETERS MIN MAX 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 3.80 4.00 1.27 5.80 6.20 0.40 1.27 D A e B 0.101mm 0.004in. 0-8 A1 C L A A1 B C E e H L E H Narrow SO SMALL-OUTLINE PACKAGE (0.150 in.) DIM PINS D D D 8 14 16 INCHES MILLIMETERS MIN MAX MIN MAX 0.189 0.197 4.80 5.00 0.337 0.344 8.55 8.75 0.386 0.394 9.80 10.00 21-0041A Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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